Supersnelle erbijsommen en erafsommen tot 20
In de mix
|
1.
4 – 2 =
2
1
4
3
|
2.
13 + 3 =
4
2
3
16
|
3.
19 + 1 =
3
4
20
2
|
4.
1 + 10 =
11
1
2
3
|
|
5.
8 + 1 =
9
1
2
3
|
6.
9 – 5 =
3
1
2
4
|
7.
14 – 2 =
1
2
12
3
|
8.
14 + 4 =
4
3
18
2
|
|
9.
17 – 16 =
1
3
4
2
|
10.
2 – 1 =
1
4
2
3
|
11.
15 + 2 =
3
4
17
2
|
12.
19 – 0 =
19
2
3
4
|
|
13.
17 + 2 =
19
2
3
4
|
14.
18 + 1 =
4
3
2
19
|
15.
12 + 3 =
15
1
3
2
|
16.
20 + 0 =
4
3
2
20
|
|
17.
1 – 0 =
4
2
3
1
|
18.
14 + 4 =
18
2
4
3
|
19.
3 – 3 =
4
2
3
0
|
20.
19 – 2 =
3
2
4
17
|